Things You'll Need
Instructions
Ensure your computer has a wireless network card. It it doesn't, you can purchase one for roughly half the price of the Xbox wireless adapter.
Set your laptop near your Xbox 360.
Insert one end of the ethernet cable into your laptop, then insert the other end into the ethernet slot on the back of the Xbox 360.
Ensure you're logged on as the Administrator. Open "Control Panel," then double-click "Network Connections." Click "Advanced," then check the option labeled "Allow other network users to connect through this computer's Internet connection." Click "OK." You may need to restart your computer or the console to complete setup.